Nylas Status

Free Personal Microsoft Outlook accounts no longer work with API v2

Monitoring - Microsoft has disabled Basic (Non-OAuth) authentication for Exchange Online mailboxes using Free or Family licenses - also known as Personal Accounts. These include free email addresses using the domains outlook.com, hotmail.com, live.com, msn.com, and others.

Microsoft only allows these mailboxes to use Exchange Web Services and Exchange ActiveSync using Basic authentication, so these mailboxes are no longer able to utilize those services. Our API v2 uses both of those services to communicate with all Microsoft mailboxes.

Microsoft has provided no work-around for continuing to use those services, so these mailboxes can no longer use our API v2 and must start using our API v3. We use Microsoft Graph API for our API v3 and that is not affected.

This does NOT affect paid mailboxes using Microsoft's Business or School licenses. This also does NOT affect on-premise Exchange mailboxes. Only free mailboxes using Microsoft's Free or Family licenses are affected.
Oct 01, 2024 - 13:09 PDT

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Operational

Degraded Performance

Partial Outage

Major Outage

Maintenance

Past Incidents

Jul 18, 2025

EU - API v2 - Temporary Service Disruption for a Subset of Accounts

Resolved - The restoration process for impacted accounts in the EU region has been fully completed, and system monitoring confirms that all services are operating normally.

For affected accounts, there may be delayed webhooks related to messages received while those accounts were offline. These are expected to be delivered shortly as backlogged data is processed.

Thank you for your patience and understanding throughout this incident.
Jul 18, 13:07 PDT

Monitoring - The restoration process for impacted accounts in the EU region has been successfully completed (100%). All services should now be functioning normally.

Our team is closely monitoring the system to ensure continued stability. If you experience any lingering issues, please don’t hesitate to contact our support team.

Thank you for your patience and understanding throughout this process.
Jul 18, 11:59 PDT

Update - We are continuing restoration efforts for a subset of accounts impacted by the earlier database failure. Restoration of the remaining ~7% of total EU user accounts is currently 70% complete.

Impacted accounts may continue to experience:
• No data synchronization
• Undelivered webhooks
• Failed API requests

Our team remains fully focused on completing the process as quickly and safely as possible. We’ll continue to share updates as we reach key restoration milestones. Thank you for your continued patience and understanding.
Jul 18, 10:00 PDT

Update - We are continuing restoration efforts for a subset of accounts impacted by the earlier database failure. Restoration of the remaining ~7% of total EU user accounts is currently 56% complete.

Impacted accounts may continue to experience:
• No data synchronization
• Undelivered webhooks
• Failed API requests

Our team remains fully focused on completing the process as quickly and safely as possible. We’ll continue to share updates as we reach key restoration milestones. Thank you for your continued patience and understanding.
Jul 18, 08:22 PDT

Update - We are continuing restoration efforts for a subset of accounts impacted by the earlier database failure. Restoration of the remaining ~7% of total EU user accounts is currently 46% complete.

Impacted accounts may continue to experience:
• No data synchronization
• Undelivered webhooks
• Failed API requests

Our team remains fully focused on completing the process as quickly and safely as possible. We’ll continue to share updates as we reach key restoration milestones. Thank you for your continued patience and understanding.
Jul 18, 07:24 PDT

Update - We are continuing restoration efforts for a subset of accounts impacted by the earlier database failure. Restoration of the remaining ~7% of total EU user accounts is currently 22% complete.

Impacted accounts may continue to experience:
• No data synchronization
• Undelivered webhooks
• Failed API requests

Our team remains fully focused on completing the process as quickly and safely as possible. We’ll continue to share updates as we reach key restoration milestones. Thank you for your continued patience and understanding.
Jul 18, 05:29 PDT

Update - We encountered an issue during the data restoration process for a subset of accounts in the EU region, which caused an unexpected delay.

The issue has been addressed, and restoration efforts are now progressing steadily again. Our team remains fully focused on completing the process as quickly and safely as possible.

Impacted accounts may continue to experience:
• No data synchronization
• Undelivered webhooks
• Failed API requests

We’ll continue to share updates as we reach key restoration milestones. Thank you for your patience and understanding.
Jul 18, 04:13 PDT

Update - We’ve reached 50% completion in the data restoration process for impacted accounts in the EU region.
As a reminder, affected accounts may continue to experience:

• No data synchronization
• Undelivered webhooks
• Failed API requests

Our team is actively working to complete the restoration as quickly and safely as possible.

The next update will be posted once we reach 100% completion.

Thank you for your continued patience and understanding.
Jul 18, 01:12 PDT

Update - We are continuing the restoration process for a subset of accounts affected in the EU region.

At this time, approximately 15% of the affected data has been successfully restored. Impacted accounts may still experience issues with data sync, webhook delivery, and API calls during this time.

Our next update will be posted once we reach 50% restoration progress.

Thank you for your continued patience.
Jul 17, 22:20 PDT

Identified - We are currently addressing an issue impacting a limited number of accounts in the EU region following a cluster migration.
Some accounts are temporarily unavailable and are experiencing:

• No data synchronization
• Undelivered webhooks
• Failed API requests

We have identified the root cause and are actively working to restore the affected accounts. The restoration process is underway and is expected to take approximately 3–4 hours.

We will continue to share updates as the work progresses. We appreciate your patience and understanding.
Jul 17, 21:22 PDT

Jul 17, 2025

Jul 16, 2025

No incidents reported.

Jul 15, 2025

No incidents reported.

Jul 14, 2025

No incidents reported.

Jul 13, 2025

EU [API v2] - Rolling Database Optimizations

Completed - The scheduled maintenance has been completed.
Jul 13, 21:00 PDT

In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 11, 17:00 PDT

Scheduled - We will be conducting a rolling database optimization impacting V2-related components in the EU region. This scheduled maintenance is expected to have very low impact, but users may experience intermittent 50X errors and occasional delays in webhook processing at certain times during the maintenance window.

Start Time:
2025-07-12 00:00 UTC

End Time:
2025-07-14 04:00 UTC

We will be closely monitoring our systems throughout the maintenance period.

If you have any questions or concerns, please contact our support team at support@nylas.com.
Thank you for your understanding.
Jul 2, 16:30 PDT

Jul 12, 2025

No incidents reported.

Jul 11, 2025

Jul 10, 2025

No incidents reported.

Jul 9, 2025

No incidents reported.

Jul 8, 2025

No incidents reported.

Jul 7, 2025

No incidents reported.

Jul 6, 2025

No incidents reported.

Jul 5, 2025

No incidents reported.

Jul 4, 2025

No incidents reported.

Psst – give Nylas API v3 a try

About This Site

Past Incidents